US7322706B2 - Device for adjusting light intensity for discharge lamp projectors - Google Patents

Device for adjusting light intensity for discharge lamp projectors Download PDF

Info

Publication number
US7322706B2
US7322706B2 US10/854,225 US85422504A US7322706B2 US 7322706 B2 US7322706 B2 US 7322706B2 US 85422504 A US85422504 A US 85422504A US 7322706 B2 US7322706 B2 US 7322706B2
Authority
US
United States
Prior art keywords
optical assembly
discharge lamp
light intensity
lamp
iris diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/854,225
Other languages
English (en)
Other versions
US20050007560A1 (en
Inventor
Mario De Sisti
Fabio De Sisti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Sisti Lighting SpA
Original Assignee
De Sisti Lighting SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Sisti Lighting SpA filed Critical De Sisti Lighting SpA
Assigned to DE SISTI LIGHTING S.P.A. reassignment DE SISTI LIGHTING S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SISTI, FABIO D., SISTI, MARIO D.
Publication of US20050007560A1 publication Critical patent/US20050007560A1/en
Assigned to DE SISTI LIGHTING S.P.A. reassignment DE SISTI LIGHTING S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SISTI, FABIO D., SISTI, MARIO D.
Assigned to DE SISTI LIGHTING S.P.A. reassignment DE SISTI LIGHTING S.P.A. RE-RECORD TO CORRECT THE INVENTORS SURNAMES ON A DOCUMENT PREVIOUSLY RECORDED AT REEL 015741, FRAME 0734. (ASSIGNMENT OF ASSIGNOR'S INTEREST) Assignors: DE SISTI, FABIO, DE SISTI, MARIO
Application granted granted Critical
Publication of US7322706B2 publication Critical patent/US7322706B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/10—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of iris type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • the present invention relates to a device for adjusting light intensity for discharge lamp projectors.
  • the invention relates to a device for adjusting light intensity for discharge lamp projectors that allows to obtain an adjustment of intensity avoiding all the drawbacks of the known systems.
  • a mechanical shutter is mounted in front of the projector, making it possible to vary the light intensity, blocking the light rays emitted from the projector.
  • said solution induces geometric aberrations of the emitted light beam, reducing the light efficiency of the projector when the shutter is fully open.
  • the specific object of the present invention is to provide a device for adjusting light intensity for discharge lamp projectors comprising an optical assembly comprised of a discharge lamp and a spherical mirror, and of a Fresnel lens, provided in front of the lamp of said optical assembly.
  • said optical assembly is movable along a longitudinal axis between two different foci, respectively, a “flood” or “large beam” point and a “spot” or “narrow beam” point.
  • FIG. 1 is a schematic diagram showing an embodiment of the device of the present invention.
  • FIG. 1 showing a schematic view of an embodiment.
  • FIG. 1 shows a device according to the invention
  • an optical assembly 1 comprising a spherical mirror 2 and a lamp 3 , said assembly being movable according to arrows A shown in the figure.
  • a Fresnel lens 4 In front of the movable assembly 1 , provided is a Fresnel lens 4 , that must create the light beam.
  • an iris diaphragm 5 is provided on said optical assembly, in correspondence with the focus of the lamp 3 .
  • iris diaphragm 5 provided close to the lamp 3 within a Fresnel 4 lens projector, interposed between the optical assembly 1 inside the projector and the lens 4 , and integral with the movable element, is the most characteristic feature according to the invention.
  • the incidence angle of the concentric light rays emitted from the inner optical assembly 1 (lamp 3 and mirror 2 ) to the lens varies.
  • the focus of the optical assembly is reproduced at the centre of the iris, allowing a modulation of the light amount without altering the geometry and the direction of the (concentric) light rays, by simply blocking the amount of the light rays.
  • the device according to the invention allows to adjust light intensity (dimmer effect) by acting on the light rays emitted from the inner optical assembly 1 without modifying the direction of the light rays and without creating any shadow, since the device acts on the beam before the latter reaches the Fresnel lens 4 .
  • the solution according to the invention photometric features, uniformity of emitted light and light efficiency of the projector are preserved without being influenced by the presence of the inventive device. Since iris is fully open, the spot and flood values of light intensity, amplitude and uniformity of the light beam correspond to those of the same standard projector without mechanical dimmer. This result could not be obtained by the conventional mechanical dimmers, since they are mounted after the Fresnel lens in the light pathway, thereby introducing optical aberrations (not uniform light beam) and, according to the various specific cases, often influence the light emission by reducing its Intensity, even when they are completely open (for example horizontal or vertical blade shutters).
  • the solution according to the invention allows to expand the use of an energy saving technology to different professional fields (e.g., video production, movies, events, fashion, shows, theatre and architecture) when used on small-size projectors that are mounted with various types of low electric power and high luminous efficiency discharge lamps available on the market.
  • professional fields e.g., video production, movies, events, fashion, shows, theatre and architecture
US10/854,225 2003-05-30 2004-05-27 Device for adjusting light intensity for discharge lamp projectors Expired - Fee Related US7322706B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000271A ITRM20030271A1 (it) 2003-05-30 2003-05-30 Dispositivo per la regolazione dell'intensita' luminosa per proiettori con lampade a scarica.
ITRM2003A000271 2003-05-30

Publications (2)

Publication Number Publication Date
US20050007560A1 US20050007560A1 (en) 2005-01-13
US7322706B2 true US7322706B2 (en) 2008-01-29

Family

ID=29765846

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/854,225 Expired - Fee Related US7322706B2 (en) 2003-05-30 2004-05-27 Device for adjusting light intensity for discharge lamp projectors

Country Status (6)

Country Link
US (1) US7322706B2 (it)
EP (1) EP1482240B1 (it)
AT (1) ATE390603T1 (it)
DE (1) DE602004012652T2 (it)
ES (1) ES2304597T3 (it)
IT (1) ITRM20030271A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1399471B1 (it) * 2009-09-11 2013-04-19 Clay Paky Spa Proiettore per palcoscenico e metodo per operare un proiettore per palcoscenico
US10258447B2 (en) * 2017-01-24 2019-04-16 Allergan Industrie Sas Thread insertion devices
US10845030B1 (en) 2020-02-26 2020-11-24 Electronic Theatre Controls, Inc. Lighting fixture with internal shutter blade

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955599A (en) * 1931-07-30 1934-04-17 Us Holding Corp Motor vehicle headlight
US2558964A (en) 1948-12-16 1951-07-03 Kliegl Bros Universal Electric Iris protection apparatus for highintensity spotlights
US4232359A (en) * 1979-04-09 1980-11-04 Berkey-Colortran, Inc. Spotlight or other illuminator
US4338654A (en) 1980-09-20 1982-07-06 Richard Logothetis Variable spot stage light
US4517630A (en) * 1981-12-08 1985-05-14 Robert Bosch Gmbh Motor vehicle headlight with condensing lens and diaphragm
US4770525A (en) * 1986-03-24 1988-09-13 Casio Computer Co., Ltd. Liquid crystal projector
EP0402845A2 (de) 1989-06-16 1990-12-19 Reiche Und Vogel H.M. Wörwag Gmbh Scheinwerfer, der in seiner Helligkeit stufenlos regelbar ist
US5833341A (en) * 1992-03-18 1998-11-10 Canon Kabushiki Kaisha Illuminating optical system and projector utilizing the same
US20050135106A1 (en) * 2003-12-22 2005-06-23 Schott Glas Fresnel lens spotlight with coupled variation of the spacing of lighting elements
US20050162750A1 (en) * 2003-12-22 2005-07-28 Schott Ag Fresnel lens spotlight
US20050168995A1 (en) * 2003-12-22 2005-08-04 Schott Ag Fresnel lens spotlight with coupled variation of the spacing of lighting elements

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955599A (en) * 1931-07-30 1934-04-17 Us Holding Corp Motor vehicle headlight
US2558964A (en) 1948-12-16 1951-07-03 Kliegl Bros Universal Electric Iris protection apparatus for highintensity spotlights
US4232359A (en) * 1979-04-09 1980-11-04 Berkey-Colortran, Inc. Spotlight or other illuminator
US4338654A (en) 1980-09-20 1982-07-06 Richard Logothetis Variable spot stage light
US4338654B1 (it) 1980-09-20 1984-03-20
US4517630A (en) * 1981-12-08 1985-05-14 Robert Bosch Gmbh Motor vehicle headlight with condensing lens and diaphragm
US4770525A (en) * 1986-03-24 1988-09-13 Casio Computer Co., Ltd. Liquid crystal projector
EP0402845A2 (de) 1989-06-16 1990-12-19 Reiche Und Vogel H.M. Wörwag Gmbh Scheinwerfer, der in seiner Helligkeit stufenlos regelbar ist
US5833341A (en) * 1992-03-18 1998-11-10 Canon Kabushiki Kaisha Illuminating optical system and projector utilizing the same
US20050135106A1 (en) * 2003-12-22 2005-06-23 Schott Glas Fresnel lens spotlight with coupled variation of the spacing of lighting elements
US20050162750A1 (en) * 2003-12-22 2005-07-28 Schott Ag Fresnel lens spotlight
US20050168995A1 (en) * 2003-12-22 2005-08-04 Schott Ag Fresnel lens spotlight with coupled variation of the spacing of lighting elements

Also Published As

Publication number Publication date
DE602004012652T2 (de) 2009-06-18
ITRM20030271A0 (it) 2003-05-30
EP1482240A2 (en) 2004-12-01
DE602004012652D1 (de) 2008-05-08
ATE390603T1 (de) 2008-04-15
ITRM20030271A1 (it) 2004-11-30
US20050007560A1 (en) 2005-01-13
EP1482240A3 (en) 2006-08-16
EP1482240B1 (en) 2008-03-26
ES2304597T3 (es) 2008-10-16

Similar Documents

Publication Publication Date Title
US20040252257A1 (en) Dual-screen Liquid crystal display
JP4040688B2 (ja) Ｌｅｄを有する信号灯
US4462067A (en) Spotlight and adjusting system
US7736025B2 (en) Illumination system comprising mechanical dimming device
US9222649B2 (en) Stage lighting fixture
US10551017B2 (en) Light control system for a luminaire utilizing a lamp with intense hotspot
US4739456A (en) High intensity pattern/follow spot projector
JP2005183400A (ja) フレネルレンズスポットライト
US8979327B2 (en) Spotlight
US6924945B1 (en) Compact light collection system with improved efficiency and reduced size
US7322706B2 (en) Device for adjusting light intensity for discharge lamp projectors
US6942363B1 (en) Metal halide accent fixture with adjustable reflector/beam spread
CN208418535U (zh) 一种调整光源模组光束分布的hid舞台灯系统
CN100437151C (zh) 高亮度匀光可调光斑投光装置
JP4398165B2 (ja) Ｘ線照準器の照明システム
US8672520B2 (en) AC voltage reflector lamp
JP2010146824A (ja) ソーラシミュレータ
CN201012936Y (zh) 高亮度匀光可调光斑投光装置
KR100427134B1 (ko) 영상프레임에 빛을 분산시키기 위한 장치
EP0994294A3 (de) Beleuchtungsvorrichtung zur Anbringung an einer ersten, eine Lichtaustrittsebene definierenden Wand
JPS5855527Y2 (ja) 調光装置
KR101800634B1 (ko) 청색 레이저다이오드와 형광체를 이용한 산업용 조명장치
KR20240020491A (ko) 결상광학 줌 기능 기반의 수직형 마이크로 led를 구비한 조명장치
SU857907A1 (ru) Осветительна система
JPS61140917A (ja) 光量調節方法とその装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: DE SISTI LIGHTING S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SISTI, MARIO D.;SISTI, FABIO D.;REEL/FRAME:015741/0734

Effective date: 20040324

AS Assignment

Owner name: DE SISTI LIGHTING S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SISTI, MARIO D.;SISTI, FABIO D.;REEL/FRAME:015780/0887

Effective date: 20040324

AS Assignment

Owner name: DE SISTI LIGHTING S.P.A., ITALY

Free format text: RE-RECORD TO CORRECT THE INVENTORS SURNAMES ON A DOCUMENT PREVIOUSLY RECORDED AT REEL 015741, FRAME 0734. (ASSIGNMENT OF ASSIGNOR'S INTEREST);ASSIGNORS:DE SISTI, MARIO;DE SISTI, FABIO;REEL/FRAME:016782/0418

Effective date: 20040324

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20120129